rsync and xfr#1, to-chk=0/1, what do they mean?

I do stuff such as :- $ copy debian-8.2.0-amd64-DVD-1.iso /media/shirish/4719-38E5/ Copy here is an alias for :- $ alias copy alias copy='rsync –progress -ravz' When it does the command it takes a long time to complete and does :- $ copy debian-8.2.0-amd64-DVD-1.iso /media/shirish/4719-38E5/ sending incremental file list debian-8.2.0-amd64-DVD-1.iso 3,607,855,104 100% 9.11MB/s 0:06:17 (xfr#1, to-chk=0/1) sent … Read more

bit rot detection and correction with mdadm

I’m about to re-organise all my HDDs in my home linux box nas and would like to use mdadm raid for data protection and its flexibility for reshaping the arrays. However, before I use mdadm for this I’d like to know how it handles bit rot. Specifically the kinds of bit rot that do not result in unrecoverable read error messages being sent from the HDD.